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Troubleshooting Waits for 'SQL*Net message to client' and 'SQL*Net more data to client' Events from a Performance Perspective (Doc ID 1404526.1)

Last updated on OCTOBER 24, 2019

Applies to:

Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.

Purpose

The purpose of the note is to assist troubleshoot waits for 'SQL*Net message to client' and 'SQL*Net more data to client' events.

NOTE: These waits are not Oracle's wait, but normally idle wait event or network wait.  This note is informational only and should not be considered an Oracle wait event.

 

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
 What are the 'SQL*Net message to client' and 'SQL*Net more data to client' events?
 How to Diagnose Waits for the 'SQL*Net message to client' and 'SQL*Net more data to client' events
 Potential Solutions
 1. SDU size
 2. Arraysize
 3. TCP
 Community Discussions
References

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